title: Isotopes and groundwater management strategies under semi-arid area: case of the Souss upstream basin (Morocco).
abstract: This study concerns the Souss upstream basin. The objective is to investigate the characteristics of surface water and groundwater, to assess the impact of artificial recharge as reinforcement of the natural replenishment and assess the renewal of groundwater under semi-arid area. Two major water types are observed: (i) surface waters and upstream springs (least mineralized) and (ii) all groundwater samples (prevailing calcium and magnesium bicarbonate water type). Water isotopes show a low evaporation of precipitations during infiltration. Impoverishment in heavy isotopes is the characteristic of mountain rainfalls, or of a climate colder and wetter than present. Carbon-14 activities (34-94 pmc) indicate a long residence time. The artificial recharge is low compared to the reservoir volume, due to which the renewal rate is also low.
authors.affiliation: UMR 6249 Chrono-Environnement, interactions et transferts dans la biogéosphère, Université de Franche Comté. 16 route de Gray, Besançon, France. latifa.bouragba@univ-fcomte.fr
authors.forename: L
authors.initials: L
authors.lastname: Bouragba
authors.forename: J
authors.initials: J
authors.lastname: Mudry
authors.forename: L
authors.initials: L
authors.lastname: Bouchaou
authors.forename: Y
authors.initials: Y
authors.lastname: Hsissou
authors.forename: M
authors.initials: M
authors.lastname: Krimissa
authors.forename: T
authors.initials: T
authors.lastname: Tagma
authors.forename: J L
authors.initials: JL
authors.lastname: Michelot